normalizePath() warning

Prof Brian Ripley wrote:

On Mon, 12 Jun 2006, Duncan Murdoch wrote:

On 6/12/2006 4:53 PM, Roger D. Peng wrote:

I've been getting the following warning after running 
'install.packages()' recently:

Warning message:
insufficient OS support on this platform in: normalizePath(path)

Does anyone know what this means?  And does anyone know how I can get rid 
of the
warning?  I've just installed R on a fresh FC5 system so I feel I might 
have
forgotten to install a package/library or something.

This is printed when your R source was compiled without these defines:

#if defined(HAVE_GETCWD) && defined(HAVE_REALPATH)

I guess you can look in your config log to see why you don't have those.

This worked for me on a vanilla FC5 system.  I guess the issue is likely to 
be realpath, whose definition is enclosed by

#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
#endif

so I would review the compiler options used:  -std=gnu99 is recommended 
(and selected by default).  I do get the warning with -std=c89 and 
-std=c99.

Indeed, my modification of CFLAGS was the problem.  However, if I may offer a 
meager defense, the comments for CFLAGS in 'config.site' say:

	If unspecified, defaults to '-g -O2 -std=c99' for gcc